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<Title>WebChartViewer.getCustomAttr</Title>
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<p class="heading0">ChartDirector 7.0 (Java Edition)</p>
<p class="heading1"><a href="WebChartViewer.htm">WebChartViewer</a>.<wbr>getCustomAttr</p>
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<p class="heading2a">Usage</p>
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public String getCustomAttr(String key)
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<p class="heading2">Description</p>
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Gets a custom attribute.<br><br>
The WebChartViewer does not interpret or use custom attributes. It merely receives them from the browser side <a href="JsChartViewer.htm">JsChartViewer</a> control. On the browser side, these attributes are set using <a href="JsChartViewer.setCustomAttr.htm">JsChartViewer.setCustomAttr</a>.<br><br>
Custom attributes are useful for transferring application specific information between the server and the browser during partial chart updates (AJAX requests).<br><br>
For example, one one can use custom attributes to update the states of the HTML controls on the browser side during partial chart updates. (For non-AJAX requests, the server can always update the web page directly.)<br><br>
Both the key and value of a custom attribute should be text strings. The key should be a valid variable name, that is, it should start with A-Z, a-z or underscore, and consists entirely of alphanumeric characters with no spaces.
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<p class="heading2">Arguments</p>
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<th width="19%">Argument</th><th width="19%">Default</th><th>Description</th>
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<td>key</td><td>(Mandatory)</td><td>The attribute key.</td>
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<p class="heading2">Return Value</p>
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The value of the required attribute.
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